Gold is an incredibly fascinating subject. Not only has this shiny, yellow & soft metal been used since at least 4000 BC. but, gold has been used as currency, jewelry, is a sought-after investment option & is widely used in the production of electronic devices. Did you know, for example, that most of the earth’s gold (approximately 1.6 quadrillion tons) lies at its core as the precious metals’ high density caused it to sink there in the planet’s youth? This and other gold facts in the following infographic from SBC Gold.